Pipe-wrench.



PATENTED JAN, 2, 1906.

R. ADAMS.

PIPE WRENCH.

APPLICATION rum) MAR.7,1905.

PATENT FIOE.

RICHARD ADAMS, OF TORONTO, CANADA.

PIPE-WRENCH.

Specification of Letters Patent.

Patented Jan. 2, 1906.

Application filed March 7, 1905. Serial No. 248,948.

To all whom, it may concern:

Be it known that I, RICHARD ADAMS, of the city of Toronto, in the countyof York and Province of Ontario, Canada, have invented certain new anduseful Improvements in Pipe-Wrenches and I hereby declare that thefollowing is afull, clear, and exact description of the same.

This invention relates to certain new and useful improvements in thatclass of pipe- Wrenches having amovable jaw held in its adjustedposition by a detent-rack, assisted by the action of a spring-tensionedlocking-plunger; and it relates more particularly to the peculiarconstruction and operation of the movable jaw and locking-plunger and tothe oscillating action of the fixed jaw cooperat ing with the movablejaw to bite the work.

In carrying out the invention the body portion of the wrench is madewith a longitudinally-apertured offset having one of its inner facesserrated to engage with the serrated face of the shank for the movablejaw. This shank is arranged to move longitudinall y through theapertured offset as the jaw is adjusted and is of a lesser width thanthe width of the aperture, so that it will have a limited lateralmovement therein to enable its serrated face to disengage itself fromthe serrated face of the offset, so that it may move freely in eitherdirection as the movable jaw is adjusted to the fixed jaw.

The invention also relates to a spring-tensioned locking-plungercontained within a corresponding chamber in the body portion to engagethe adjacent face of the shank and position it to enable the serrationsto engage and hold it in such position until the pressure of thelocking-plunger is released, and the invention further relates to thepeculiar construction and operation of the fixed jaw, which is arrangedto oscillate from its normal position to its operative position duringthe use of the wrench and is returned from its operative to its normalposition by the action of a tension-spring, as hereinafter more fullyset forth, and more particularly pointed out in the claims.

For a full understanding of the invention reference is to be had to thefollowing description and to the accompanying drawings, in which- Figure1 is a perspective view of the wrench, showing the fixed and movablejaws. Fig. 2 is a longitudinal section of the same. Fig. 3

is a sectional view of a part of the body portion, showing it strippedof the fixed and movable jaws and locking-plunger for the movable jaw.Fig. 4 is a perspective view of the fixed jaw. Fig. 5 is a perspectiveview of the locking-plunger. Fig. 6 is a perspective view of the triggerfor the lockingplunger.

Like letters of reference refer to like parts throughout thespecification and drawings.

it represents the body portion of the pipewrench, which has at one endan offset 7), lon gitudinally apertured to receive the shank c of themovable jaw (Z, which is longitudinally movable through the aperturedoffset and slightly less in width than the aperture, so that it may havea limited lateral movement to enable its serrations to disengagethemselves from the serrated face of the offset during its longitudinalmovement. The inner face I) of the offset 1) is serrated to inter meshwith the serrations c on the adjacent face of the shank 0 when the.shank is pressed against the face I) by the spring-tensionedlocking-plunger e. The locking-plunger e is contained in anobliquely-disposed chamber f, formed in the adjacent part of the bodyportion a, so that its head 6 will be positioned to normally engage theadjacent side of the shank 0 when contained in the apertured offset. Inthe chamber f is an annular shoulder g, forming an abutment for thetensionspring h, which bears against it and against the head 6 of thelocking-plunger to press the locking-plunger against the shank of themovable jaw and position the movable jaw so that the serrations 0 willinterlock with the serrated face I) to enable the serrations to securelyhold the jaw in its adjusted positionf Tothe outer end of thelocking-plunger is pivoted a trigger 'i, contained in a recess j at theouter end of the chamber f. By pressing the upper end of the triggerinward or to ward the body portion a, the locking-plunger e is actuatedto release the pressure of its head against the shank of the movablejaw, so that the shank can be displaced laterally to allow of thedisengagement of the serrations to per mit of the shank and movable jawbeing ably movable in said chamber and through the body portion a andthe shank Z is a pivotpin q, upon which the fixed jaw oscillates duringthe use of the wrench.

In the use of the wrench the movable jaw is adjusted relatively to thefixed jaw by re leasing the pressure of the locking-plunger against theshank, so that its serrations may be displaced laterally from engagementwith the serrated face of the offset to allow of the shank moving freelyin either direction. When the movable jaw has been properly adjusted,the locking-plunger is allowed to return to its normal position to pressthe serrated face of the shank into engagement with the serrated face ofthe offset, so that the shank and movable jaw will be securely held intheir adj usted position. When the movable jaw has been adjustedrelatively to the fixed aw to insure both jaws obtaining a secure biteupon the work, the rotation of the wrench will cause the fixed jaw tooscillate upon the pin q, so that its face will move into a planeapproximately parallel with the face of the stationary jaw.

Having thus fully described my invention, what I claim as new, anddesire to secure by Letters Patent, is

1. A pipe-wrench comprising a body portion having at one end anapertured offset with one of its inner faces serrated and a transverselydisposed chamber extending from the aperture of the offset to theopposite side of the body portion, a movable jaw having a shank with aserrated face to engage with the serrated face of the offset, a springtensioned plunger slidable in said chamber to engage said shank, atrigger to actuate the plunger and a fixed jaw for the body portionopposed to the movable jaw.

2. A pipe-wrench comprising a body portion having at one end anapertured offset with one of its inner faces serrated and a transverselydisposed chamber extending from the aperture of the offset to theopposite side of the body portion, a movable jaw having a shank with aserrated face to engage with the serrated face of the offset, an annularshoulder in said chamber, a plunger slidthe annular shoulder, atension-spring engag- 1 ing said shoulder and plunger to press its headagainst the shank of the movable jaw, a trigger to actuate the plungerand a fixed jaw for the body portion opposed to the movable aw.

3. A pipe-wrench comprising a body portion having at one end anapertured offset with one of its inner faces serrated and a transverselydisposed chamber extending from the aperture of the offset to theopposite side of the body portion, a movable jaw having a shank with aserrated face to engage with the serrated face of the offset, aspringtensioned plunger slidable in said chamber to engage said shank, atrigger to actuate the plunger, a fixed jaw for the body portion opposedto the movable jaw having a rocker contained in a corresponding recessin the adjacent end of the body portion, a lug for the rocker, atension-spring contained within an extension of said recess engagingsaid lug and body portion and arocker-pin passing through the bodyportionand rocker.

4. A pipe-wrench comprising a body por tion having atone end anapertured offset with one of its inner faces serrated and a transverselydisposed chamber extending from the aperture of the offset to theopposite side of the body portion, a movable jaw having a shank with aserrated face to engage with the serrated face of the offset, an annularshoulder in said chamber, a plunger slidably movable in said chamber andthrough the annular shoulder, a tension-spring engaging said shoulderand plunger to press its head against the shank of the movable aw, atrigger to actuate the plunger, a fixed jaw for the body portion opposedto the movable jaw, having a rocker contained in. a corresponding recessin the adjacent end of the body portion, a lug for the rocker, atension-spring contained within an extension of said recess engagingsaid lug and body portion, and a rocker-pin passing through the bodyportion and rocker.

Toronto, March 2, A. D. 1905.

RICHARD ADAMS. In presence of L. FLoRELLA BROOK, H. L. TRIMBLE.

